ES218 Datasheet, PDF (12/26 Pages) Cyrustek corporation – 2000 Counts Manual DMM

1.10. Temperature Measurement mode
ES218
2000 Counts Manual DMM
Temperature measurement mode takes input signal from ADP pin. The ES218 has ºC to ºF scale
translation circuit and standard K-type thermocouple reference table is built-in. External
cold-junction compensation circuit is still necessary.
Mode
o_C
o_F
FC1~4
0,1,0,0
0,1,0,0
SLACDC / FC6
1,1
0,1
Range
-200 ºC ~ 1350 ºC
-328 ºF ~ 2462 ºF
Input Terminal
ADP V.S. SGND
Temperature mode circuit example:
ES218
AGND
SGND
ADP
V/ R
TEMP
S2
SW-SPDT
VR1 200
R3 270
R10 15K
R1 1.8K
TEMP
R2 200K
S3
SGND
R4 15K
Close toV/R/TEMP
Q3 2N3904
DIP 2N3904
V/ R
TEMP
S1
SW-SPDT
R8
PTC 2.2K
R5 10M
R9 1M
R6 10K
Q1
2N2222
Q2
2N2222
V+
R7
2.2K
U1
LM385_1.25V
COM
V / R / TEMP
V 1.5
12
2015/12/11