Fluke 1738 Calibration Manual

Logger/Monitor
Setup
15
Verification Box Assembly
This Verification Box provides more accurate voltages than a direct connection to the 5520A. The 5520A
uses a divider with a 50 Ω output impedance when sourcing <330 mV. Due to variations in the Logger input
impedance, the actual applied voltage is less than the programmed voltage. Using an external divider where
the parallel resistance is ~30 Ω allows calculation of the applied voltage with confidence that the Logger
input loading will not significantly impact the applied voltage.
Fluke recommends using a verification box that has a divider with 30 Ω across the Logger input and 10 kΩ in
series with high side of the input. See Table 6 for instructions on how to make the verification box.
Table 6. 1730 Verification Box
hcf105.eps
Item Description Part Number/Info Fluke Part Number QTY

Multi-Contact Box: MA 524
Type: XKH-4/19/A
Order-No.: 66.9045-33
NA 1

Resistor, Metal Foil 10 kΩ,
±0.1 %, 0.6 W, ±4.5 PPM
Red Plug/Red Socket 2114858 1

Resistor, 30 Ω, 1W, 1% 20 PPM
Red Socket/Black Socket +
Bridge Black Plug/Socket
1757740 1
2
3
1
Contacts Pretinned
Contacts
Pretinned
Red Plug
Red
Socket
Black Socket
Black Plug
Soldered
Soldered
Soldered
Soldered
10 k
30 Ω
Red
Black Black
Red

Fluke 1738 Specifications

General

Product type	Three phase power measurement logger
Cable lock slot type	Kensington
International Protection (IP) code	IP50
Operating altitude	0 - 4000 m
Non-operating altitude	0 - 12000 m
Storage temperature (T-T)	-20 - 60 °C
Operating temperature (T-T)	-10 - 50 °C
Operating relative humidity (H-H)	10 - 95 %
Built-in display	Yes
Display diagonal	4.3 \
Touchscreen type	Resistive
Display resolution	480 x 272 pixels
Display technology	TFT
Efficiency	68.2 %
Battery life	4 h
Charging time	6 h
Battery voltage	3.7 V
Input frequency	50/60 Hz
Battery capacity	9.25 Wh
Power consumption (max)	50 VA
Battery life (power save mode)	5.5 h

Weight and Dimensions

Depth	55 mm
Width	198 mm
Height	167 mm
Weight	1100 g
Power adapter weight	400 g
Power supply dimensions (WxDxH)	130 x 45 x 130 mm