EWELLY EW-988TK Operation Manual

EW-988TK Operation Manual
Thank you for choosing Ewelly instruments. This product combines a wide range of refrigeration
technology, which is simple to operate with accurate temperature control and strong anti-interference
ability. It is suitable for a variety of refrigeration, heating equipment and automatic intelligent control
systems. The sensor produced by our company is packaged by a precise process , which has m oisture-
proof function and stable performance .

Product Specification

1. Operating Voltage：AC220V±10％; 50HZ/60HZ
2. Output：10A/220V/AC ; 10A/220V/AC
3. Power Consumption：≤3W
4. Working Environment：-10℃～50℃；RH≤90 ％
5. Control Range：-20℃/-5℉～105℃/220℉; (Factory setting: 12℃)
6. Resolution：-20~99.9℃ is 0.1℃; Accuracy: ±0.5 ℃ ; 100～105℃ is 1℃; Accuracy: ±1℃
-5℉~220℉ is 1℉; Accuracy:2℉
7. Input Signal：1-Off temp. sensor, standard cable length 20K×2m
8. Overall Dimension：80（Width）×32（Height）×70（Depth）mm;
9. Mounting Size：71（Width）×29（Height）mm；

Display Panel

Symbol Description Status Explanation
Off Cooling stops
On Cooling on
Cooling
Cooling stops
Flashing under cooling
mode
Off Heating stops
On Heating on
Heating
Heating stops
Flashing under heating
mode
Version: 988 TK-366-V1.0
Up key
On/Off key
Set/Confirm/
Return key
Down key
Symbol Description Status Explanation
Fahrenheit
-
Degree
Parameter Parameter
On
Setting Setting
Alarm Signal On Faulty
Standby Standby
On
Signal Mode
Off Unlocked
Lock
On Locked
Centigrade
-
Degree

Installation Requirement

1. Please make sure that the power supply voltage meets the required voltage of the instrument. The
deviation should be less than ±10％.
2. The sensor should be kept away from the power cable.
3. Strictly distinguish the interfaces of the sensor, power cable and the relay output.

Operation Instruction

1. Standby function：
Hold "ON/OFF" key for 3 s to enter standby mode, then it displays "
disconnected.
In standby mode, press and hold the "ON/OFF" key for 3s to return to normal operation.
2. Locking function：
Under "Lock" mode, press and hold the "▲" key for 3 s to unlock along with buzzer sounds. This
meter would lock itself automatically after 30s without any actions.
3. Fast temperature setting
Under normal operation, press the " Set" key to display the control temperature (the value flashes).
Press "▲" and "▼" to adjust the parameter value s.
Hold "▲" and "▼" key to adjust the parame ter value quickly. (This is a general operation).
4. Parameter adjustment
Hold "Set" for 6s until the parameter code " HC" turns on, indicating that the system setting menu has
been entered. Switch the corresponding parameter code s by pressing "▲" and "▼".
Press " Set" to display the parameter value of the corresponding parameter code (the value flashes);
Press "▲" and "▼" to adjust the parameter value.
Press "Set" to confirm the modified parameter value and return to the upper menu.
Under the system setting status, press "ON/OFF" to exit the menu setting and return to the normal
operation.
Under the system setting status, it returns to normal operation automatically when there is no action
in 6s.
5. One-click restore of preset parameters
Under normal operation, press and hold the "▼" key for 6s or more, the display panel flashes, and
all parameters will be reset to factory settings. (please make sure to record the setting parameters
in advance)
6. Stop/Silence b uzzer alarm
Press any key to cancel the current buzzer alarm sound s, but the indicator light will not turn off until
the fault is removed.

7. System Menu

Code Description
-
Cooling
HC
/Heating
Temp. Unit
CF
Switch
Temp. Return
d
Difference
Temperature
CA
Calibration
Pt Time Delay
Temp. Upper
HS
Limit
-
Temp. Lower
LS
Limit
Factory
Setting Range
Setting
C= Cooling
C
H=Heating
C=Centigrade；
C
F=Fahrenheit
The target temp. can be controlled
0.1～15℃
2℃/5℉ to be stable in a certain setting
1～60℉
range.
This parameter corrects the temp.
-15~15℃ -60~60℉
0
when there is an error
Protect the meter from frequent
0 ～ 10 min
1
start-up
Set temp. +1℃ ～ 80℃
80℃ Prevent temp. is set too high
/220℉
-20℃/-5℉ ～ Set
-20℃
Prevent temp. is set too low
temp.-1℃
"and all outputs are
Explanation
-
-