Trident Model PD765 Universal Input Meter Instruction Manual
36
Recommended Calibration Points
To recalibrate the meter, it is recommended to use the Fahrenheit scale;
this will give a greater degree of accuracy to the calibration. The scale
can be changed to the Celsius scale after calibration is completed. The
meter will display temperature accurately in any scale. The following ta-
ble shows the recommended low and high calibration points for all
types.
Type of in-
put
Input 1
(Low)
Input 2
(High)
Check
(Middle)
Type J T/C
32
°
F 1182
°
F 600
°
F
Type K T/C
32
°
F 1893
°
F 960
°
F
Type T T/C
32
°
F 693
°
F 360
°
F
Type T T/C
32.0
°
F 693.0
°
F 360.0
°
F
Type E T/C
32
°
F 1652
°
F 840
°
F
100
Ω
RTD
(0.00385)
32
°
F
100
Ω
1148
°
F
320.12
Ω
590
°
F
215.61
Ω
100
Ω
RTD
(0.00392)
32
°
F
100
Ω
1127
°
F
320.89
Ω
580
°
F
215.87
Ω
Recalibration Procedure for Temperature Inputs
1.
Connect signal to the meter using the appropriate wire (e.g. type J
thermocouple wire to recalibrate type J input), see page 18.
2.
Set up the meter to accept the selected input (e.g. type J T/C), see
page 30.
3.
Set up the meter to display temperature in degrees Fahrenheit, see
page 31.
4.
Apply signal corresponding to input 1 (32°F) and program display 1 to
32, see page 35.
5.
Apply signal corresponding to input 2 (1182°F for type J) and program
display 2 accordingly, see page 35.
6.
After the meter accepts input 2, the display flashes the message
CJr
that indicates the meter is sensing the cold junction reference. This
completes the recalibration procedure for the selected input.
Recalibrating Process Inputs (
ICal
)
The
Internal Calibration
(
ICAL
) menu, located in the Advanced features
menu, is used to recalibrate the current and voltage inputs. Recalibra-
tion is recommended at least every twelve months.
Refer to Internal Calibration (ICal), page 59 for instructions.
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