Lakeshore Learning Materials 622 Bedienungsanleitung PDF herunterladen (Seite 74)

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual

Options & Accessories

6-6

Look up the R

REF

(T)

in Table 6-2 at the temperature of the sensor during measurement. Use the equation:

Ω

effective

active

REF

=×

/jointfilesconvert/46560/bg

where L

active

is the sensor length (line 2). Enter the

computed value in line 4 manually.

Figure 6-1. NbTi Filament Resistance Chart

6.2.7 Model 6226/6476 IEEE-488 Remote Operation Commands

Cmd Function

BFLD? Magnetic Field Query

BUNI Program Field Units

BUNI? Field Units Query

IBS? Field Summary Query

LALM Program Level Alarm

LALM? Level Alarm Query

Cmd Function

LALMS Program Level Alarm Status

LALMS? Level Alarm Status Query

LEVL Read Level

LEVL? Level Query

LUNI Program Level Units

LUNI? Level Units Query

Cmd Function

PER Program Sample Period

PER? Sample Period Query

ZREF Program Probe Zero Reference

ZREF? Probe Zero Reference Query

ZREFS Program Zero Reference Status

ZREFS? Zero Reference Status Query

BFLD? Magnetic Field Query

Input: BFLD?

Returned: A number between ±999.9999.

Remarks: Returns nine characters plus up to two terminators.

BUNI Program Magnetic Field Units

Input: BUNI [units] where [units] = kG for kilogauss, or T for tesla (10 kilogauss).

Remarks: The initial status is kG. Verify there is a space between the command and the units

parameter.

BUNI? Magnetic Field Units Query

Input: BUNI?

Returned: Either kG for kilogauss or T for tesla (10 kilogauss).

Remarks: Returns two characters plus up to two terminators.

Table 6-2. NbTi Filament Resistance Values

Temp. (K) Temp. (°C) Temp. (°F) R ref/R (T)

305.15

300.15

299.15

298.15

297.15

296.15

295.15

294.15

293.15

292.15

291.15

290.15

273.15

80.00

77.35

75.00

22.00

20.00

15.00

10.00

32.00

27.00

26.00

25.00

24.00

23.00

22.00

21.00

20.00

19.00

18.00

17.00

0.00

–193.15

–195.80

–198.15

–251.15

–253.15

–258.15

–263.15

89.60

80.60

78.80

77.00

75.20

73.40

71.60

69.80

68.00

66.20

64.40

62.60

32.00

–315.67

–320.44

–324.67

–420.07

–423.67

–432.67

–441.67

0.8401

0.8424

0.8428

0.8433

0.8438

0.8442

0.8447

0.8452

0.8456

0.8461

0.8466

0.8470

0.8550

0.9613

0.9630

0.9646

0.9973

0.9981

1.0000

1.0046

1 2 ... 69 70 71 72 73 74 75 76 77 78 79 ... 89 90

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