DD20S DIGITAL TEMPERATURE INDICATOR

OPERATORS’ MANUAL

The DD20S is a smart digital temperature indicator. It can accurately monitor two low and two high preprogrammed threshold temperatures (between -30°C and +60°C), and will indicate time and duration of a temperature breach (up to 40 days). For refrigerated applications, the DD20S is accurate within ±0.5°C.

The DD20S is programmable, easy-to-use, and water-resistant (IP65). It may be activated with a delayed start time of up to 99 hours and 59 minutes. It is more reliable and accurate than chemical indicators, which may give false positive readings.

1. SPECIFICATION

1) Operating Range: -30 to 60°C (-22 to 140ºF)

2) Accuracy: ±0.5ºC (0.9°F) from -30°C to +30°C (-22 to +86°F)

±1.5°C (2.7°F) from 30°C to 60°C (86 to 140°F)

3) Resolution: 0.1°C/0.1°F

4) Battery Life: 2 years at 22°C

5) Shelf Life: 2 years from Time of Programming

6) Dimensions: 110 x 70 x 20 mm (4.30x2.75x0.78 inch)

7) Weight: 100 grams not including battery

8) Power supply: AAA size battery x 2

9) Elapsed time: Max 40 days

10) Max record data: 99 records

11) 8 Parameter Settings: High Temp 1; High Temp 2; Low Temp 1; Low Temp 2; Excursion Time High(Max: 40 days); Excursion Time Low (Max:40 days) Delay Start Time (0 - 99hours and 59minutes) ;Sampling Interval (0-599 minutes)

* Note: Do not submerge any part of the thermometer. The thermometer should be stored at room temperature between –30 to +60°C (-22~140°F).

1 Up Key

2 Down Key

3 Start/Pause/Enter

4 Set Key

LCD Icon Explanation
/ Excursion Temperature
/ Set
/ Logger(Recording)
/ Password
/ start
/ High Temperature
/ Low Temperature
/ Sample Interval
/ Time
/ OK or Not OK


Operating Instructions

1. Start a new DD20S: A new DD20S, Press key to start a new Digital Temperature Indicator. When power is on, LCD will show all for over 1 seconds.

/ After 1 seconds /
Fig 1: Show all icon / Fig 2: Show actual temperature

After 1 second LCD will show actual temperature, at this state, press or key to check parameters.

Press key for more than 3 seconds and release, The Digital Temperature Indicator will enter active mode (Recording state). Press key into setting parameters menu.

2. Check parameters (Press or key to checked parameters.)

For example, we set it for low temperature -30 ~ -1ºC, normal temperature -1 ~ 7ºC, high temperature 7 ~ 40ºC. High temperature excursion and low temperature excursion is 30 minutes, sample interval time is 5 minutes, start delay time is 15 minutes, default password is 111, default temprature unit is ºC.

Note: Low temperature could no set more than 0ºC.

Fig 3: Actual date / Fig 4: High Temp. 1 / Fig 5: High Temp. 2
Fig 6: Low Temp. 1 / Fig 7: Low Temp. 2 / Fig 8: High Temp. Excursion
Fig 9: Low Temp. Excursion / Fig 10: Sample interval time / Fig 11: Start delay time
On these windows, can press key to return windows Fig 2, except windows Fig 10.

3. View history recording data:

Press key into review function. Press or key to select which parameter is to show.

Warning: Re-record will clear all recording data before.

Press key will sequential display windows below.

Fig 12: High Temp. 1 Excursion Time / Fig 13: High Temp. 2 Excursion Time / Fig 14: Low Temp. 1 Excursion Time
Fig 15: Low Temp. 2 Excursion Times / Fig 16: High Temp Excursion Times / Fig 17: Low Temp Excursion Times
Fig 18: High Temp.1 / Fig 19: High Temp. 2 / Fig 20: Low Temp. 1
Fig 21: Low Temp. 2 / Fig 22: Sample interval time / Fig 23: Start delay time
Fig 24: Record start time
On these windows, can press key to return windows Fig 2, except windows Fig 10.

4. Setting parameters: On check parameters windows (Fig 3 ~ Fig 11), Press key to into the check password menu (Fig 25). Press or key to change number and press key to select which number to be change (flash). Default password is “111”, when input is completed, press key to confirm. If enter wrong password, window Fig 26 will be display (Password not OK). When try 3 time to enter wrong password, it will return the date windows Fig 27 or Fig 3.

Fig 25: Check password / Fig 26: Input password is false / Fig 27: Actual date
Note: Please remember it, if you change the password.

If input password is correct, the set parameters menu will show on: (Press key to increase digits or press key to decrease digits, press key move cursor to right digit or change parameters item.)

Note: Curcor can not move to left, when setting error, will move to right and cycle.

Fig 28: Set date and time / Fig 29: Set High Temp. 1 / Fig 30: Set High Temp. 2
Fig 31: Set Low Temp. 1 / Fig 32: Set Low Temp. 2 / Fig 33: Set High Temp. Excursion
Fig 34: Set Low Temp. Excursion / Fig 35: Set sample interval time / Fig 36: Set start delay time
Fig 37: Set password / Fig 38: Set Temp. unit (ºC/ºF)
Press or key to change unit

When set is completed, press key to confirm

5. Active state: Press key for more than 3 seconds and release, The Digital Temperature Indicator will enter active mode (Recording state), and clear all recorded data before.

Fig 39: Temperature

Note: When this indicator being recorde, all display will be blank, this is power saving mode.

When indicator is start, the start delay will show on:

Fig 40: Start delay countdown

The start delay time will countdown, when start delay time is 0H00M, it will record temperature.

6. Paused state: When the Digital Temperature Indicator recording state, Press key for more than 3 seconds and release, password menu will show on. When user input correct password and press key, the indicator will paused. Now, it show actual temperature, if temperature in the range “OK” (Fig 41) will show, or “” will show (Fig 42). Press key for more than 3 seconds and release, it will continue recording temperature and blank display.

Fig 41: temperature is OK / Fig 42: Temperature is Not OK

7. Stop recording and save state: When the Digital Temperature Indicator recording state or recording data check state, press key for more than 3 seconds and release will display password input menu. Please input password, then press key, the Ditital Temperature Indicator will stop recording and save all data, blank display and power off. This state can press key to restart it.

8. Check recording data: When the Digital Temperature Indicator recording state, Press or key for 3 seconds and release, will display Fig 41 or Fig 42 windows, then press key will show windows below:

Fig 43: High Temp. 1 Excursion Time / Fig 44: High Temp. 2 Excursion Time / Fig 45: Low Temp. 1 Excursion Time
Fig 46: Low Temp. 2 Excursion Times / Fig 47: High Temp Excursion Times / Fig 48: Low Temp Excursion Times
Fig 49: High Temp.1 / Fig 50: High Temp. 2 / Fig 51: Low Temp. 1
Fig 52: Low Temp. 2 / Fig 53: Sample interval time / Fig 54: Start delay time
Fig 55: Record start time
Note: If within 15 seconds, no any key to be press, it will return to recoding state and blank display.

9. Reset the DD20S: Clear all data, except date and time. When check parameters state, on Fig 10 Sample interval time windows. Press key for more than 3 seconds and release, the Indicator will show warning windows (Fig 56), and then press for more than 3 seconds and release to confirm clear data (Fig 57). When it is reseted, all the recording data, password and parameters will lose, and the Digital Temperature Indicator will return to the “new” state.

Fig 10: Sample interval time / Fig 56: Warning clear settings / Fig 57: Clear settings succeed

Warning: Data clear can not be resumed please be careful operation.

10. Battery

The DD20S incorporates visual low battery indication as follows:

‘Battery OK’:
measurements are possible / ‘Battery Low’:
measurements are possible / ‘Battery Exhausted’: measurements are not possible

Note: When replace batteries, all recorded data, parameters and password will be reserved. But date and time will restore to default factory date and time.