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17 TECHNICAL DATA
r
17.1 Performance
Standard search head
Range:
Accuracy:
Pitch resolution:
Narrow Pitch search head
Range:
Accuracy:
Pitch resolution:
Deep cover search head
Range:
s
Accuracy
:
Pitch resolution:
t
Half-cell mode
Range:
Accuracy:
Half-cell probes
Stability:
17.2 Physical
Weight (including Deep head search head):
r.
All performance figures have been obtained when using Elcometer reference rebars of standard diameter at
room temperature.
s.
Accuracy figures for the deep cover search head are obtained once the operating temperature has
stabilised (after 10 minutes continuous use of the search head).
t.
Half-cell mode is not included on the Elcometer 331 Model B.
40 mm (1.6") bar:
8 mm (0.3") bar:
up to 65 mm (2.6") depth:
over 70 mm (2.8") depth:
16 mm (#5) diameter bar at 50 mm (2") depth of cover;
pitch ≥ 75 mm (3")
40 mm (1.6") bar:
8 mm (0.3") bar:
up to 45 mm (1.75") depth:
over 50 mm (2") depth:
10 mm (#3) diameter bar at 30 mm (1.2") depth of cover;
pitch ≥ 55 mm (2.15")
40 mm (1.6") bar:
8 mm (0.3") bar:
up to 65 mm (2.6") depth:
over 70 mm (2.8") depth:
16 mm (#5) diameter bar at 100 mm (4") depth of cover;
pitch ≥ 125 mm (5")
17 mm to 100 mm (0.65" to 4")
9 mm to 75 mm (0.35" to 3")
±2 mm (0.1")
±3%
9 mm to 75 mm (0.35" to 3")
5 mm to 55 mm (0.2" to 2.2")
±1 mm (0.05")
±2 mm (0.1")
50 mm to 200 mm (2" to 8")
25 mm to 150 mm (1" to 6")
±2 mm (0.1")
±3%
-999 mV to +999 mV
±5 mV
10 mV with 3 µA load
1.6 kg (3.5 lb)
R
T
ECHNICAL DATA
31
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