Fluke NetDAQ 2640A, Service Manual

Page: 25 / 260

Introduction and Specification
Specifications
1
1-9
2640A/2645A General Specifications 1-11.
Table 1-5 provides the general specifications for the 2640A and 2645A instruments.
Table 1-5. 2640A/2645A General Specifications
Specification Characteristic
Channel Capacity 20
I/O Lines Total 12
Size 9.3 cm (3.67 in) high, 21.6 cm (8.5 in) wide, 36.2 cm (14.28 in) deep
Weight Net, 4 kg (8.8 lb.) Shipping, 6.0 kg (13.2 lb.)
Power 107 to 264V ac (no switching required), 45 to 65 Hz, 15 VA maximum
9V dc to 16V dc, 6W maximum. Specifications are for 50 or 60 Hz operation.
If both sources are applied simultaneously, ac voltage is used if it exceeds
approximately 8 times the dc voltage. Automatic switchover occurs between ac
and dc without interruption.
Standards Both instruments comply with:
IEC 1010-1
UL 1244
CSA Bulletin 556B
ANSI/ISA-S8201-1988
CSA C22.2 No. 101.1-92
Vfg. 243/1991 (when shielded cables are used)
FCC-15B, Class B level (when shielded cables are used)
Serial Interface
(RS-232C) Connector: 9 pin male (DB-9P)
Signals: TX, RX, DTR, RTS, GND
Modem Control: full duplex
Baud rates: 4800, 9600, 19200, 38400
Data format: 8 data bits, no parity bit, one stop bit
Flow control: XON/XOFF
Echo: Off
Common Mode
Voltage 2640A 150V (300V on channels 1 and 11)
2645A 50V dc or 30V ac rms.
Measurement Speed
(Scanning Rates) 2640A
Slow - 6 readings per second
Medium - 48 readings per second (60 Hz)
Fast - 143 readings per second (20 configured channels)
Single Channel - 120 readings per second
2645A
Slow - 54 readings per second (60 Hz)
Medium - 200 readings per second
Fast - 1000 readings per second (20 configured channels)
Single Channel - 400 readings per second
Accuracy of Medium
Scanning Rate Equal to (Fast Accuracy Rate + Slow Accuracy Rate)/2
Additional error if
“Automatic drift
correction” is turned
off. If the instrument is fully warmed-up at the time drift correction was disabled, i.e.,
turned on at least 1 hour earlier: 1/10 of the 90-day specification per
°
C change
in ambient temperature from the temperature when drift correction was disabled.
If the instrument was not fully warmed up at the time of drift correction was
disabled: add an error equal to the 90-day specification for instrument warmup
+1/10 of the 90-day specification per
°
C change in ambient temperature from the
temperature when drift correction was disabled.