Testing showed that AC current needs to be handled different from DC.
Note that ACA is still untested because of limited testing equipment.
Signed-off-by: Wolfram Sang <w...@the-dreams.de>
---
src/dmm/vc870.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/src/dmm/vc870.c b/src/dmm/vc870.c
index d14b841..ee61483 100644
--- a/src/dmm/vc870.c
+++ b/src/dmm/vc870.c
@@ -46,11 +46,17 @@ static const float factors[][8] = {
{1e-4, 0, 0, 0, 0, 0, 0, 0}, /* Diode */
{1e-3, 1e-2, 1e-1, 1, 1e1, 1e2, 1e3, 1e4}, /* Frequency */
{1e-2, 0, 0, 0, 0, 0, 0, 0}, /* Loop current */
+ /*
+ * Note: Measurements showed that AC and DC differ
+ * in the factors used, although docs say they should
+ * be the same.
+ */
{1e-8, 1e-7, 0, 0, 0, 0, 0, 0}, /* DCµA */
- {1e-8, 1e-7, 0, 0, 0, 0, 0, 0}, /* ACµA */
+ {1e-7, 1e-6, 0, 0, 0, 0, 0, 0}, /* ACµA */
{1e-6, 1e-5, 0, 0, 0, 0, 0, 0}, /* DCmA */
- {1e-6, 1e-5, 0, 0, 0, 0, 0, 0}, /* ACmA */
+ {1e-5, 1e-4, 0, 0, 0, 0, 0, 0}, /* ACmA */
{1e-3, 0, 0, 0, 0, 0, 0, 0}, /* DCA */
+ /* TODO: Verify factor for ACA */
{1e-3, 0, 0, 0, 0, 0, 0, 0}, /* ACA */
{1e-1, 0, 0, 0, 0, 0, 0, 0}, /* Act+apparent
power */
{1e-1, 0, 0, 0, 0, 0, 0, 0}, /* Power factor /
freq */
--
2.1.4
------------------------------------------------------------------------------
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