Guildline 934 4T Series User manual

Operation Manual
For The
Model 934X–4T
Precision Four Terminal
Decade Resistance Boxes
NOTICE
The contents and information contained in this manual are proprietary to
Guildline Instruments. They are to be used only as a guide to the operation
and maintenance of the equipment with which this manual was issued and may
not be duplicated or transmitted by any means, either in whole or in part,
without the written permission of Guildline Instruments.
OM934X-4T-D-00
2 February 2017

OM934X-4T-D-00
2 February 2017
RECEIPT AND INSPECTION
GENERAL
Remove the instrument from its shipping container. The instrument was thoroughly tested and inspected before
shipment and should be free from any electrical or mechanical damage when received. Nevertheless, you
should perform an inspection for physical damage, ensure all items on the packing list are present and test the
instrument, electrically, as soon as possible after receipt. Refer to the warranty card at the front of the manual if
any damage or deficiencies are found.
SHIPPING CONTAINER
We recommend that the shipping container be retained for future storage or transportation of this instrument.
ii

OM934X-4T-D-00
2 February 2017
Table of Contents
Page
SECTION 1 –INTRODUCTION 1-1
General Theory 1-2
Figure 1-1 Decade Box Schematic Diagram 1-2
SECTION 2 –SPECIFICATIONS 2-1
Table 2-1 Resistance Specifications 2-2
Table 2-2 Resistance Range and Resolution 2-3
SECTION 3 –MAINTENANCE 3-1
iii

Section 1 - Introduction
OM934X-4T-D-00
2 February 2017
The Model 934X-4T is a four terminal variation of the Model 934X Series Precision Decade Resistance Boxes. It
combines techniques established at Guildline in the construction and stabilizing of resistors, and low level
switching techniques used in many of our instruments. Decade step values below the 1 ohm are arranged in a
Kelvin Varley configuration. Note that the decade resistance box will not provide correct values if utilized as a 2
terminal device below the 1 ohm step decade.
The current terminals are labeled as C1and C2on the top panel and the potential terminals are labeled as P1and P2
on the top panel. A terminal is provided on the top panel to allow connection of a ground or guard to the metallic
enclosure. The minimum resistance between the C1and C2terminals is a nominal 2 ohm value.
The main features of the 934X-4T are:
Resistance range from 0.001 m to 111 k
Accuracy better than 0.01%
Temperature coefficient less than 5 ppm/ C
Switch and wiring resistance effects of the four terminal arrangement are less than 10 u
Direct reading of resistance value at the 4 terminals
Resolution available to 1 u
Long life rotary switches
1-1

Section 1 - Introduction
OM934X-4T-D-00
2 February 2017
GENERAL THEORY
The 934X-4T series wiring consists of 3, 4, 5, 6 or 7 decades of resistors switched in a four terminal series
configuration. Figure 1-1 illustrates schematically the wiring of the 9347-4T model. The Models 9343, 9344,
9345, 9346 and 9347 are identical except for the number of decades. The model value designations of the
resistances are related to the total resistance of the unit when all decades are set at maximum resistance. These
values are listed in Table 2-2 along with the resistance resolution available with the lowest value decade. Note
that the minimum dial setting is 1 ohm except for those models which do not have an x1 decade. Models
without an x1 decade will have the first step of the highest decade as the minimum dial setting.
Figure 1-1 Decade Box Schematic Diagram
1-2

Section 2 –Specifications
OM934X-4T-D-00
2 February 2017
General:
Long Term Stability: See Table 2-1
Zero Resistance: Less than 10 u with four terminal connections
Breakdown Voltage: 1000 Volts to case
Dimensions:
9343 W 11.5 cm, L 24 cm, H 10 cm
9344 W 11.5 cm, L 29 cm, H 10 cm
9345 W 11.5 cm, L 37 cm, H 10 cm
9346 W 11.5 cm, L 40.5 cm, H 10 cm
9347 W 11.5 cm, L 43 cm, H 10 cm
Weight:
9343 2.6 kg
9344 3.25 kg
9345 3.75 kg
9346 4.3 kg
9347 4.5 kg
2-1

Section 2 –Specifications
OM934X-4T-D-00
2 February 2017
Electrical Specifications:
Decade
Resistance
Step
Resistance
DC
Accuracy
23 +/- 1 C
Long Term
Stability
ppm/year
Temperature
Coefficient
ppm/ C
Power
Coefficient
ppm/mW
Maximum
Power
W/Step
Maximum
Current
Ampere
Maximum
V/ Step
0.01 m
0.001 m
15%
150
25
0.3
-
1.2
0.7
0.1 m
0.01 m
10%
100
20
0.3
-
1.2
0.7
1 m
0.1 m
3%
35
10
0.3
-
1.2
0.7
10 m
1 m
1%
35
10
0.3
-
1.2
0.7
0.1
10 m
0.3%
20
5
0.3
-
1.2
0.7
1
0.1
0.1%
20
5
0.3
.5
1.2
0.7
10
1
0.01%
20
5
0.2
.5
0.7
0.7
100
10
0.01%
10
5
0.2
.5
0.2
2
1 k
100
0.01%
10
5
0.2
.5
0.07
7
10 k
1 k
0.01%
10
5
0.2
.5
0.02
20
100 k
10 k
0.01%
10
5
0.2
.5
0.007
70
Notes: 1. The apparent power coefficient is due to the voltage coefficient of the resistor.
2. The decades below 1 ohm are arranged in a Kelvin Varley configuration and cannot be used
as a 2 terminal resistance. The minimum resistance across C1and C2is 2 ohm.
3. Zero resistance residual offset is less than 10 u in a 4 terminal configuration.
TABLE 2-1: Resistance Specifications
2-2

Section 2 –Specifications
OM934X-4T-D-00
2 February 2017
MODEL
TOTAL RESISTANCE
RESOLUTION
9343-4T-0.001
1.110 m
0.001 m
9343-4T-0.01
11.10 m
0.01 m
9343-4T-0.1
111.0 m
0.1 m
9343-4T-1
1.110
1 m
9343-4T-10
11.10
10 m
9343-4T-100
111.0
100 m
9343-4T-1k
1.110 k
1
9343-4T-10k
11.10 k
10
9343-4T-100k
111.0 k
100
9344-4T-0.01
11.110 m
0.001 m
9344-4T-0.1
111.10 m
0.01 m
9344-4T-1
1.1110
0.1 m
9344-4T-10
11.110
1 m
9344-4T-100
111.10
10 m
9344-4T-1k
1.1110 k
100 m
9344-4T-10k
11.110 k
1
9344-4T-100k
111.10 k
10
9345-4T-0.1
111.110 m
0.001 m
9345-4T-1
1.11110
0.01 m
9345-4T-10
11.1110
0.1 m
9345-4T-100
111.110
1 m
9345-4T-1k
1.11110 k
10 m
9345-4T-10k
11.1110 k
100 m
9345-4T-100k
111.110 k
1
9346-4T-1
1.111110
0.001 m
9346-4T-10
11. 11110
0.01 m
9346-4T-100
111.1110
0.1 m
9346-4T-1k
1. 111110 k
1 m
9346-4T-10k
11. 11110 k
10 m
9346-4T-100k
111.1110 k
100 m
9347-4T-10
11. 111110
0.001 m
9347-4T-100
111. 11110
0.01 m
9347-4T-1k
1.1111110 k
0.1 m
9347-4T-10k
11.111110 k
1 m
9347-4T-100k
111.11110 k
10 m
TABLE 2-2: Resistance Range and Resolution
2-3

Section 3 –Maintenance
OM934X-4T-D-00
2 February 2017
Maintenance:
The model 934X-4T series of four terminal decade resistance boxes do not require any specific maintenance other
than periodic verification of the resistance accuracy. The accuracy can be verified by measurement with a suitable
long scale multi-meter of sufficient accuracy. The lower decade values below 1 ohm can be measured while setting
the first step of the 1 ohm decade at the x1 position and calculating the differences in resistance value as the lower
decades are switched through the 10 steps from 1 to 10.
For best verification accuracy it is recommended that a DC Comparator Resistance Bridge be used to make the
measurements.
3-1