11 - 5
IM 4H3B1-01E
1. MAINTENANCE
11.5 Calibration
It is recommended to perform a calibration once a year to assure the measuring
accuracy.
Required instruments:
DC Voltage Standard: YOKOGAWA Model 2552 or equivalent.
Decade Resistance Box: YOKOGAWA Model 2793-01 or equivalent.
Calibration procedure:
1 Connect the calibration instrument to the input terminals of the recorder as shown in
figures 11.3, 4 , 5 or 6 and allow the recorder to warm up for at least 30 minutes.
Allow the instrument to warm up according to its specifications.
2 Check that the ambient temperature and humidity are within Normal Operating
Conditions (see chapter 10 ‘General Specifications’).
3 Apply an input corresponding to 0, 50 and 100 percentage of the entered setting range,
and calculate errors from the readings on the display.
4 If the error is at any point outside the accuracy limits (for accuracies, see chapter 10
‘General Specifications’), contact your nearest Sales & Service Office. Addresses may
be found on the back cover of this manual.
NOTE For a TC input, it is necessary to measure the temperature of the input terminals, and
add a voltage corresponding to the reference temperature.
DC Voltage Measurement
11.5 Calibration
The figure blow shows the pen model, but connection should be done in the same way
for the dot model.
Figure 11.3 DC Voltage Measurement
2
Input terminals
(DC V & TC inputs)
–
+
G
+
–
DC Voltage Standard
N
L
3
4
1
Power Supply terminal
(for others than /P1 model)
To Next Page
Loading...
Need help?
General
