IFR COM-120B Service Manual

1-8-3 DVM
CALIBRATION
PREREQUISITES:
1-8-1 POWERSUPPLYCALIBRATTON
EOUIPMENT
REQUIRED:
1
CALIBRATOR
FIGURES:
NONE
STEP
PROCEDURE
1.
Apply Power
to COM-120B. Allow
5
minute warm-up
period.
2.
Connect
Calibrator
to SCOPE/DVM
Connector
(20).
3.
Press
MTRS
Instruments
Key
(4).
4.
Select
"3.
DVM"
on
Meters Menu.
5. Set
Peak
Hold
to OFF.
6. Set Average
to OFF.
7.
Set
Source
to SC/DVM
AC.
8.
Set
Meter
Reading
Units
to
Vrms.
9.
Set
Range
as shown in Table 1-3. For
each Range
setting, set
Calibrator for
stated input.
Verify Meter
Reading
matches input
within
specified
tolerance. lf not,
go
to Step
13.
Range
Callbrator Input
Frequency
Readlng
Tolerance
200
v 190 Vrms
50 Hz
110.1 V
20v
19 Vrms
1 kHz
11.02 V
2V
1
.9 Vrms
2O kHz
1106
mV
Table 1-3
SC/DVM AC Range
Settings
10.
Set Source
to SC/DVM DC.
11.
Set
Range
as
shown
in Table 1-4.
For
each Range
setting,
set Calibrator for
stated input.
Verify
Meter
Reading matches
input within
specified tolerance. lf not,
go
to Step 13.
Range
Callbrator
Input Readlng
Tolerance
200 v
1
90 Vdc
+10.1 V
20v
19 Vdc
11.02 V
2V
1
.9 Vdc
t106
mV
Table
1-4
SC/DVM DC Range
Settings
1-9
1-8-3 DVM CALIBRATION
PREREQUISITES:
1-8-1 POWER SUPPLY CALIBRATION
EQU IPMENT REQUIRED: CALIBRATOR
FIGURES: NONE
STEP PROCEDURE
1. Apply Power to COM-120B. Allow 5 minute warm-up period.
2. Connect Calibrator to SCOPE/DVM Connector (20).
3. Press MTRS Instruments Key (4).
4.
Select "3. DVM" on Meters Menu.
5. Set Peak Hold to OFF.
6.
Set Average to OFF.
7.
Set Source to SCIDVM AC.
8. Set Meter Reading Units to
Vrms.
9. Set Range as shown in Table 1-3. For each Range setting, set Calibrator for stated input.
Verify Meter Reading matches input within specified tolerance. If not, go to Step 13.
Range Calibrator Input Frequency
Reading Tolerance
200 V 190 Vrms 50 Hz
!
±1 O. 1 V
20 V 19 Vrms
1 kHz
±1.02 V
2V
1.9 Vrms
I
20 kHz
±106 mV
I
Table 1-3 SC/DVM AC Range Settings
10. Set Source to SCIDVM DC.
11. Set Range as shown in Table 1-4. For each Range setting, set Calibrator for stated input.
Verify Meter Reading matches input within specified tolerance. If not, go to Step 13.
Range Calibrator Input
Reading Tolerance
200 V 190 Vdc
±10.1 V
20 V
19 Vdc
±1.02 V
2 V 1.9 Vdc
±106 mV
Table 1-4 SC/DVM DC Range Settings
1-9
Scans by ArtekMedia © 2008

IFR COM-120B Specifications

General

Brand	IFR
Model	COM-120B
Category	Measuring Instruments
Language	English